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Test TC-152A - Brake Switch Sense Circuit

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS - 2.5L article.
  1. Turn ignition off. Disconnect brake switch connector. Turn ignition on. Using a voltmeter, check voltage of brake switch sense circuit at brake switch connector. See BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION table. If voltage is more than 9 volts, go to next step. If voltage is 9 volts or less, go to step 4).
  2. Observe brake switch status on scan tool. Connect a jumper wire from brake switch sense circuit to ground. If scan tool display changed from PRESSED to RELEASED, replace brake switch. Perform TEST VER-2A. If scan tool display did not change, go to next step.
  3. Using a ohmmeter, check resistance of ground circuit at brake switch connector. See BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2A. If resistance is 5 ohms or more, repair open ground circuit. Perform TEST VER-2A.
  4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector for pushed out terminals or damage. Repair PCM connector as necessary. Perform TEST VER-2A. If PCM connector is okay, go to next step.
  5. Using a ohmmeter, check resistance of brake switch sense circuit between PCM connector terminals No. 50 and 62. See PCM CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open brake switch sense circuit. Perform TEST VER-2A.
  6. Using a ohmmeter, check resistance of brake switch sense circuit at PCM connector terminal No. 62. See PCM CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 5 ohms, repair short to ground on brake switch sense circuit. Perform TEST VER-2A. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A.
BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION

Application Wire Color
Brake Switch Sense Circuit Brown/White
Brake Switch Ground Circuit Black
PCM CONNECTOR WIRE IDENTIFICATION

Application Wire Color
PCM Terminal No. 50 (Ground Circuit) Black
PCM Terminal No. 62 (Brake Switch Sense Circuit) Brown/White
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